Cerlic CBX User manual

2017-12-15 C81E5EN18
CBX
Cerlic CBX
Sludge Blanket Monitor

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CBX
Index
INDEX....................................................................................................................................................................2
1. GENERAL INFORMATION .....................................................................................................................4
SECURITY INFORMATION................................................................................................................................................. 4
DESCRIPTION OF THE FUNCTION.................................................................................................................................... 4
WORKING PRINCIPLE ....................................................................................................................................................... 4
SENSOR BODY .................................................................................................................................................................... 4
2. INSTALLATION.........................................................................................................................................5
Unpacking............................................................................................................................................................................ 5
Damages............................................................................................................................................................................... 5
Packing.................................................................................................................................................................................. 5
Content.................................................................................................................................................................................. 5
3. STARTING UP ...........................................................................................................................................5
Mechanical installation................................................................................................................................................. 6
Water connections........................................................................................................................................................... 7
Electrical connection...................................................................................................................................................... 7
Sludge rake guard limit switch, Trigger................................................................................................................ 7
USER INTERFACE .............................................................................................................................................................. 8
DESCRIPTION OF IMPORTANT DISTANCES WHEN INSTALLING CBX ........................................................................ 8
Home position, A............................................................................................................................................................... 9
Blind zone, B ....................................................................................................................................................................... 9
Max depth, C ....................................................................................................................................................................... 9
Sludge level, D .................................................................................................................................................................... 9
Measured range, E ........................................................................................................................................................... 9
Raker, F ................................................................................................................................................................................. 9
Fluff, G.................................................................................................................................................................................... 9
INSTALLATION,SOFTWARE............................................................................................................................................. 9
Configuration mode ........................................................................................................................................................ 9
Parameters.......................................................................................................................................................................... 9
Advanced settings (Defaults)....................................................................................................................................10
CBX MODE.......................................................................................................................................................................11
Rake interval ....................................................................................................................................................................11
Normal setting.................................................................................................................................................................11
Save and exit.....................................................................................................................................................................12
OPERATION ..................................................................................................................................................... 12
EMERGENCY RETRACTION OF THE CABLE...................................................................................................................12
LED INDICATION ............................................................................................................................................................ 12
BB1/BB2 MENU FOR CBX........................................................................................................................................... 13
Settings................................................................................................................................................................................13
CBX Setup...........................................................................................................................................................................14
Calibration.........................................................................................................................................................................14
Cleaning..............................................................................................................................................................................15
Scale / Alarm....................................................................................................................................................................15
System..................................................................................................................................................................................15
Timer....................................................................................................................................................................................15
INFORMATION DISPLAY ............................................................................................................................. 16
CALIBRATION ..................................................................................................................................................................16
Calibration of sensor.....................................................................................................................................................16

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CBX
4. DETAILED INFORMATION OF CBX ................................................................................................. 17
Main control board........................................................................................................................................................17
SENSOR.............................................................................................................................................................................18
Cable drum assembly....................................................................................................................................................18
.................................................................................................................................................................................................18
Heater & fan......................................................................................................................................................................19
.................................................................................................................................................................................................19
Flushing tube & valve ...................................................................................................................................................19
Connection terminal .....................................................................................................................................................19
5. SAFETY INSTRUCTIONS, CE MARKING .............................................................................................. 20
5. MAINTENANCE...................................................................................................................................... 20
Manual operation of CBX............................................................................................................................................21
Maintenance schedule..................................................................................................................................................21
Cable and sensor.............................................................................................................................................................21
6. TROUBLESHOOTING........................................................................................................................... 22
ALARM..............................................................................................................................................................................22
COMMON SYMPTOMS AND POSSIBLE CAUSES .............................................................................................................23
TESTS................................................................................................................................................................................ 23
Quick control of the calibration...............................................................................................................................23
Control of max value.....................................................................................................................................................24
7. CONTACT INFORMATION.................................................................................................................. 24
8. WARRANTY............................................................................................................................................ 24
9. SPECIFICATION, CBX........................................................................................................................... 25
10. SPARE PARTS AND OPTIONS ...................................................................................................... 26
Spareparts P/N.........................................................................................................................................................26
Options ................................................................................................................................................................................26
11. DIMENSIONS IN MM (“).............................................................................................................. 26
APPENDIX 1, PROFILE ................................................................................................................................. 27
APPENDIX 2,SERVICE FORM..................................................................................................................... 28
APPENDIX 3, SETUP FORM........................................................................................................................ 29

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CBX
1. General information
It is of great importance to read all parts of this manual prior to startup of the
instrument. If the Blanket Monitor is not used and handled according to this manual,
then the life and functionality may be jeopardized, and all warranties will be voided.
Security information
This instrument should be used by qualified and authorized personnel only.
It is mandatory to follow all security and other routines that apply at site when
using the CBX.
Within EU it is prohibited to dispose of electric and electronic waste in regular waste as
these may contain harmful substances. All electric and electronic waste must be
sorted and left for recycling. Such products are labeled with an X-marked waste
bin. It is important that everyone cooperate in order to secure a high level when
it comes to recycling and help to save our environment. If such waste is handled
and recycled according to regulation (EC Directive 2002/96/EC) the environment as
well as people’s health may be jeopardized.
The cable or the sensor must not be touched while it is going up or down (pinching).
CBX noise level is below 70 dB(A).
Description of the function
CBX is an optical suspended solids meter designed to measure sludge and fluff blanket
depth in clarifiers, thickeners, etc. in water and wastewater plants, as well in other
facilities. It is possible to display measured values as text or as a graphic image of the
sludge profile.
Working principle
The sensor is sent down into the clarifier/thickener and measures the suspended solids
as it descends and sends the data via a communication cable to the Control Box. By
submersing the sensor into the liquid you are able to obtain reliable suspended solids
readings versus depth and avoid problems from foam and fluff layers in the
clarifier/thickener.
Sensor body
The sensor body contains optics and electronics that should not be exposed to
mechanical abuse or high temperatures. If the sensor body has mechanical damages,
water may penetrate into the sensor and destroy the electronics and optics. Please see
section Maintenance for more information.

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CBX
2. Installation
It is important that installation, maintenance and configuration only are done by
authorized personnel to avoid damages on the product. .
Unpacking
The unit has been tested and approved before delivery from factory. Please check to
confirm that no visible damages occurred during shipment. Make sure that all
equipment inside the cabinet is secure and that the sensor and cable can move freely.
Damages
If damages occurred during shipment, immediately contact your shipper as well as your
Cerlic representative within 2 days of receipt. The shipment may be returned only after
contact has been made with Cerlic.
Packing
The original packing is designed to protect the equipment and should be used for
storage or if the goods must be returned. If other packing material is used Cerlic is not
responsible for damages during transport.
Content
Please check that the content corresponds to your order and packing list.
3. Starting up
Connect power to the CBX and the Control Box (BB1/BB2). Connect the signal cable
between both units. The Control Box must have program version 3.1 or higher so it will
automatically detect and connect to the CBX.
It is a good idea to power CBX from the same group as the rake/stirrer
if one exists. Then both will stop at the same time at power failure or
triggered fuse. This avoids tearing the sensor off if the CBX loses
power while the rake/stirrer continues to move.

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CBX
Mechanical installation
The support consists of two brackets, left and right hand, and a crossbar brace.
Assemble the parts according to the figure.
Hang the assembly on the handrail with the 1 ½” u-bolts or special L brackets for 4” or
6” handrails with supplied set screws. There are two leveling screws to adjust the stand
to hang horizontal/vertical.
Mount the CBX so there is no risk that the sensor will be stuck in something on the way
down in the basin. This is extra important for outdoor installations where wind can
make the sensor swing so much that it is a risk that it will stuck in,for example a hand
railing.
Make sure that the sensor runs freely, or through a detachable protection at least 50 cm
from the flushing tube. This is for reaching the sensor for control, cleaning and
calibration.
When CBX is installed outdoors there is a risk of flush lines freezing at sub zero
temperatures. This will not damage the instrument but the automatic cleaning function
will stop working. It is also recommended to use a CBX Jacket (P/N 11205969) when
there is a risk of temperatures below 23ºF (-5ºC).
Leveling screws
U-bolts for 1 ½”
handrail or 4”/6”
angled handrail.

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CBX
Water connections
On the bottom right hand side of the cabinet there is a ¼ ” male connection for flexible
flush hose. Connect a tube with at least ½” diameter for flushing. The water pressure
shall be between 2 – 6 bar and must not exceed 6 bar (90 psi). Outdoor installations
must protect water pipe or hose from freezing conditions or the water must be
disconnected and emptied to avoid the hose or valve from freezing. Under all circum-
stances flushing should be avoided when the outdoor temperature is below 0 ºC (32ºF).
Electrical connection
In the bottom lower left corner of the cabinet there are the four ½” npt female electrical
connections. Any wires required to go outside the cabinet can be found here.
Electrical connections must be installed by authorized personnel only. The connections
are terminated in the junction box inside the cabinet on the left side.
Connection box for power supply & rake limit switch
fig 16
If emergency winding/unwinding is to be performed, use the up / down switch. NOTE!
Binding risk between cable drum and droplet drainage.
Sludge rake guard limit switch, Trigger
CBX can be installed in an environment where a moving rake is being used. This is done
by installing a border contact, closing (NO), which is controlled by the scraper’s
movement. The signal generated will be used to start the measuring cycle. It is
important that there are no objects in front of or behind the sensor when the measuring
starts.
Rake limit contact
N/O Contact 24VDC from CBX

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CBX
The location of the border contact is crucial for achieving reliable sampling. See contact
2 and 3 (Rake limit switch) in fig 16.
All sampling modes are dependent of the connection of a rake guard limit switch which
is a N/O (normally open) contact. The digital input for the limit switch can be used in
several different ways for control of the CBX
NOTE! A limit switch must be used in all applications where a rake or other
moving equipment may come in contact with the sensor or cable. Cerlic Controls
AB does not assume any responsibility for damages caused by the absence or
malfunction of the rake guard limit switch.
Relay contact 4, 5 and 6 in fig 16. Depending on the setting on the motherboard, this
relay can be used for to indicate a fault (alarm) or ongoing measurement.
User interface
The Control Box (BB1/BB2) will show the CBX as a standard “X” sensor on the display
and it will show both sludge and fluff level in text on the display. If only one sensor
location is used on the Control Box, CBX will display the previous sludge level,
concentration and depth in real time during soldering. All configuration is done via the
Control Box to which CBX is connected.
Description of important distances when installing CBX
The figure below shows the different terms used for distances that are involved in the
configuring of the CBX.

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CBX
Home position, A
The sensor will always return to this position.
Blind zone, B
Sludge or foam detected in this zone during lowering of the sensor is not registered.
Unwanted interference is prevented by setting this zone to be 1’ (0.3m) below the
normal liquid surface. Sensor does not start to measure until it reaches this distance.
Max depth, C
This is the maximum distance from the home position. The sensor will stop at this depth
if no sludge is detected. The sensor might stop and return at a shorter distance if a rake
guard offset is entered (F).
Sludge level, D
The sludge level distance from bottom found when the preset sludge concentration is
reached.
Measured range, E
The output signal will vary from 4-20 mA within this range.
Raker, F
This denotes the safe height from the bottom (Max depth) to a point where the sensor
always must stop and then turn back to home position to alleviate hitting the bottom
rake.
Fluff, G
The fluff layer or depth found when the present fluff concentration is reached.
Installation, software
Turn on power to the device.
Configuration mode
Set the CBX in configuration mode, using the control panel:
Menu path
CBX → Calibrate → Mod → Conf
i
The green LED on the door should now blink. This indicates that it is in configuration mode.
In this mode no automatic measurements will take place, only manual control is allowed.
The Trig signal is ignored, this means also that the operator is responsible for having the
cable stretched and that a safe measurement can take place (no rake nearby).
Parameters
The following procedure sets the different depths and controls the calibration. This must
not be done without controlling if the sensor can move freely into the basin with regard to
scrapers, rakes, stirrers or such.
Go to calibration menu and chose manual operation and press down. The sensor will
now start to lower itself towards the liquid surface. Stop when it is a few centimeters
below the surface.
Note the depth on the display. This gives the value for ”Blind zone”.
Keep an eye on the measurement (sludge). It should now be relatively low being in the
clear phase.

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CBX
On the way down, observe the variation of the sludge value with the depth. Often two
rather sudden leaps can be observed, first when the clear phase goes to fluff and then
when fluff merges to sludge.
Check to see if there is a suitable value for fluff and sludge.
Example:
The sensor measures about 500 mg/l in clear phase, 1500 mg/l in fluff-area, and 10000
mg/l in sludge.
Appropriate thresholds are 1000 mg/l for fluff, and 6000 mg/l for sludge.
Memorize or note these leap values.
Be observant when the sensor starts to reach the bottom. If the basin is equipped with
scrapers on chains, you will have to find out the max depth from the drawings of the
basin, then the CBX will make an automatic adjustment to the height of the scrapers,
after a correct ”Rake Height” has been noted.
If there is clear ground between the scrapers, then the following procedure can be used:
When the sensor is touching the bottom the cable will go slack. Stop immediately and
feed the sensor back up until the sensor hangs freely and the cable is stretched. Note the
distance on the BB1/BB2, this is the Max Depth (C). Feed sensor all the way back up.
Advanced settings (Defaults)
Now fill in the values that you recorded at the test above.
Menu path
CBX → Set up → Avanc.CBX → Max depth
The value for this shall be the deepest value in the basin, which can be calculated from
the construction drawing.
Menu path
CBX → Set up → Avanc.CBX → Blindzone
This shall be the value down to several inches below the surface. This will prevent the
sensor from measuring in the air or surface sludge.
Menu path
CBX → Set up → Avanc.CBX → Rake height
If there are scrapers, then note the height on these here, to prevent the sensor from
reaching them.
If not, leave the value at 0.
Menu path
CBX → Set up → Avanc.CBX → Trig
This set up is for how many trig-signals pass before a measurement starts. If the value is
1,a measurement will be done at every trig-signal. At 2, every other . Normally the trig-
signal is connected to the scrape, and after it passes a measurement will be done, for
example every 5th time or suitable interval depending on the speed of the scrape. This
value must not be 0 (other than a method to shut off the measurement in an empty
basin) as no measurement will be taken.
Verify remaining set-ups in this menu:
Menu path
CBX → Set up → Avanc.CBX → Mains frek
Main frequency. 50 or 60 Hz.
Menu path
CBX → Set up → Avanc.CBX → Rake int.
Delay after trig. With this the measurement can be delayed a number of desired seconds
after the trig signal. This can be very useable if you want to extend the distance after the
passage of the scrape until the measuring point.
Menu path
CBX → Set up → Avanc.CBX → Track
Level: Normal location. CBX measures until known sludge threshold is found, and then
returns to box.
Profile: In this mode the sensor measures the depth of the whole basin to enable to
superior system which can draw a sludge profile. This demands a rather advanced
preparation in superior system and central unit, see app. 1.

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CBX
CBX Mode
There is two different modes the CBX can be set to, Setup and Trig.
Trig is the normal working mode. In this mode the CBX will take a sample on every
external trig from the rake limit switch.
Setup, the CBX must be set to this mode before changing calibration parameters or
using “MANUAL UP/DOWN” button.
Rake interval
The rake limit switch starts a measuring cycle. When the rake is passing the rake limit
switch the CBX will execute a sampling cycle. It is possible to configure the number of
pulses from the rake switch that is needed for a measuring cycle to start, called “trig”.
This parameter is called “trig int”. To delay the time between the samples use “trig int”,
(normally you will take a sample every 30 - 45 minute). This can be of use if you have
several rakes or if you want to extend the time between the samples. The pulse from the
rake limit must not be longer than one complete measuring cycle on the CBX.
Normal setting
Go back one step in the menu to come to the usual set-ups.
Menu path
CBX → Set up → Deep unit
Note decired unit for to show depth/hight
Menu path
CBX → Set up → Kons unit
Note decired unit for sludge concentration
Menu path
CBX → Set up → Analogue
Note decired mA output(s) for measuring value. For to have measurement of fluff (see
below) at the same time, use two outputs.
Menu path
CBX → Set up → Secondary
If signal for fluff is desired, choose this as a secondary signal.
Menu path
CBX → Set up → Sludge blanket
Note the leap value for what is defined as sludge. See discussion regarding this in the
previous chapter.
Menu path
CBX → Set up → Fluff
Note the leap value for what is defined as fluff. See discussion regarding this in the
previous chapter.
The value for sludge blanket (and fluff) must never be put higher than the
performance of the sensor. The sensor will reach the bottom at too high of a
sludge concentration, if a threshold higher than this value is noted it will
never be reached. The sensor will, regardless of actual concentration, never
find any sludge blanket.
i
If you need to adjust the level measurement, it is strongly recommended to modify these
thresholds rather than calibrate the sensor.

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CBX
Save and exit
Change to Mod Trig.
Menu path
CBX → Calibrate → Mod → Trig
The set ups will be saved. The sensor will return to box (if it is not there already) and
thereafter a green lamp shines solidly to indicate that CBX is ready to start as soon as the
trig-term is being met.
Operation
All configurations are done via BB1/BB2 that is connected to the CBX. All settings shall
be done and saved (done by exiting the menu) before a new sampling is performed.
Depth and concentration is shown on the BB1/BB2 on-line during a sampling cycle.
Emergency retraction of the cable
If the CBX for some reason does not retract the cable, then it is possible to do manually.
But always try to switch off the main power to the CBX for 10 seconds and then back on
line again. The CBX will always start with retracting the cable to “home position” after a
power loss. If the cable still does not retract use the emergency motor control switch
that is located on the box for the terminal block inside the CBX.
NOTE!
Binding risk between cable drum and droplet drainage.
LED indication
Red
Yellow
Green
Status
CBX Start Up, Light Test
Standby, waiting for next sample cycle
Configuration or Setup Mode
Sampling
Configuration or Setup error, check
parameters
Mechanical or Electrical Problem
Cold Temp, less than 36ºF inside the unit.
Shut down the CBX to alleviate cold weather
damage

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CBX
BB1/BB2 menu for CBX
This section describes the menus used in BB1/BB2 to set up the CBX for
operation. ! Important, you need to exit the Settings menu to save the
parameters or changes!
Settings
Tag
Name of the sensor (10 characters) shown on the main
display.
I-Time[s]
Integration time or dampening - can be set up to 999
seconds. This is integration in BB1/BB2. The value
coming from CBX is normally also an average.
Manual
up/down
Remote
control
up/
down
Depth/Hight. Chose how to measure the sludgelevel;
from surface and down (Depth) or from bottom to top
(Hight).
Manual operation of the sensor up/down via
BB1/BB2. To
make this function work the unit must switch from “
trig” to
“c
onf”.
Depth Unit
Unit used for distances in CBX settings in
m, cm, inches or feet & inches.
Cons units
Unit for measure in
”%”, ”ppm”, ”g/l”, or ”mg/l”
Analog
Set the analog output channels for sludge blanket depth
(distance D in fig 4) as primary and (optional) second
analog for fluff (distance G in fig 4) if used.. 1, 2, 3, 4, 1&2,
3&4, all or none. Standard is
all.
Second
This shows the height of the fluff layer from the bottom
Blanket
Concentration
Set the consistency that will define the blanket. This can
be done by entering a blanket concentration.
Fluff Cons
(optional)
Set the concentration that will define the fluff layer. This
can be done by entering a fluff concentration.

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CBX
CBX
Setup
CBX setup
Sub Program for initial CBX set
-up
Mains freq
The frequency of the power, i.e. 50HZ in Europe and
60Hz in the USA.
Trig
Number of trig closures before lowering the sensor
Max depth
The maximum travel distance from home position (A). The
sensor will stop at this depth if no blanket or sludge is detected
(Distance C). This travel distance will be shortened if a raker
offset exists
(distance F)
Blind zone
Distance B. Distance to where sensor must travel before it starts
to measure solids. Sludge or foam detected in this zone during
lowering is not registered.
Unwanted false blanket depth is
prevented by setting this zone to be approximately 25cm (1 ft)
below liquid surface.
Rake
height
Distanse F. This denotes the safe height from the bottom (Max
depth) to a point where the sensor always must stop and then
turn back to home position to alleviate hitting the bottom rake.
Rake int
The rake switch starts a measuring cycle. When the rake has
activated the rake switch so the CBX will execute a sampling
cycle. It is possible to configure the number of pulses from the
rake switch that is needs for a measuring cycle to start.
Track
Profile/Level. You can set if the CBX shall measure sludge profile
or only sludge and fluff levels. If the CBX is set to
Level
the sensor
will stop when it detects the sludge level and return home.
Calibration
Mode
Setup: The CBX must be set to this conf. mode before changing
calibration parameters or using “
MANUAL UP/DOWN
” button.
Trig
: This is the normal working mode. In this mode the CBX will
take a sample on every external trig. Set CBX back to Trig for normal
use..
Manual
up/down
Enables the BB1/BB2 to control the sensor in the CBX to go UP and
DOWN. In this mode the depth and concentration are displayed in
the BB2. . Must change “
MODE
” to “
TRIG
” to activate.
Take
sample
No / Zero / Sample - Chose the type of calibration. Zero is for clean
water and Sample is sludge sample or concentration.
Cons
Current concentration.
Sample
Enter concentration from Lab test – concentration/suspended solids
value for Sample.

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CBX
Cleaning
Cleaning
Yes/No Yes, flush cleaning is switched ON. No, the
flush is switched
OFF.
Manual
up/down
Enables the BB1/BB2 to control the sensor in the
CBX to go UP and DOWN. In this mode
the sensor
is switched off and can be left out
for an unlimited
time for cleaning. Must change “
MODE” to
“
TRIG” to activate.
Scale / Alarm
Max
Max level or 20 mA output, distance E in fig 2
Min
Min level or 4 mA output
Hi-
Alarm
Max level for alarm
Low-
Alarm
Min level for alarm
Alarm
Relay
Pick which alarm relay is to be used on the
BB
1/BB2
System
Type
Type of sensor, read only information
Serial
Serial number of the sensor, read only information
SoftW
Software version of the sensor, read only
information
Info
Ch1
Info, measured light value on channel 1
Ch2
Info, measured light value on channel 2
Samples
Counter that shows total number of samples taken
by the CBX from the last power off.
Timer
Timer
On/Off, switch the timer function on or off
Interval min
Delay time between samples in minutes
Relay
Relay 1/ Relay 2, can be used as level alarms. You
can configure one of the internal relays as a timer
to start the CBX if you do not have a rake to use as
a trigger.
Next time
Next time the sample starts

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CBX
Information display
If you press and ENT key at the same time you will see an information display that
shows the status of the display.
If you press one more time at the and ENT key you will see a graphical profile of the
last sampling (available on software on the BB1/BB2 3.23 and later) .
The profile shows fluff and sludge level, the top number is fluff level and the lower
number is sludge level measured from the tank bottom and up.
fig 3
Calibration
Before leaving the factory the CBX sensor is calibrated to give accurate measurement
directly at installation. Normally the calibration only needs to be verified with even
intervals. The status of the sensor can disturb the calibration if it has got a couting on
the glasses in the measuring gap, it will then show a too high value.
Zero calibration is done with clean, de-aerated water in a bucket without direct sunlight.
Sludge (Sample) calibration is done with a known concentration in a bucket.
Calibration of sensor
1. Enter the menu in the central unit by holding ”ENTER” for five seconds. Choose
Calibrate in the menu and press ”ENTER”.
Change ”MOD” value from ”Trig” to ”Conf” confirm with ”ENTER”. The green LED
lamp on the door starts to flash. The display now shows Measured value display.
2. Enter the CBX menu again by pressing ”ENTER” for five seconds. Chose Calibrate
again. Now it says “Mod” on ”Conf” (configurate).
Scroll down to ”Remote control” and confirm with ”ENTER”. Here it is possible to
hover the sensor up and down with the keys.
Press arrow down to hover down the sensor. OBS; The cable must be held
stretched. The sensor shall be vertical on the way down, if you angle it more than
50° it will stop.
Leave the menu, and go back to Calibrate by pressing ”ENTER”.
120 cm
120 cm
30 cm

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CBX
3. Clean and control the lenses, lower the sensor in clean water. Look at the ”Conc”
value: If this is close to 0 move on and control sludge. Put the sensor in sludge. If
an expected value is shown then no calibration is necessary. Move on to item 7.
4. If it shows another value, calibration shall be done:
Go to “Take Sample” and confirm with ”ENTER”. Chose ”Zero” on the right side in
the display and confirm with ”ENTER”. Next window asks: This will change the
calibration. Continue? Chose ”Yes” and confirm with ”ENTER”. Next window
wants you to acknowledge sensor in clean water, confirm with ”ENTER”. Now
the zero-point is calibrated.
5. Test calibration; Choose “Take sample” in the menu and then “Sample”. Stir the
sample so it will not settle. Confirm with “ENTER”. Next window asks: This will
change the calibration. Continue? Chose ”Yes” and confirm with ”ENETER”. Lower
the sensor in a bucket with the sludge sample. New window wants you to
acknowledge sensor in test 1, confirm with ”ENTER”.
6. Continue to “Value” and press ”ENTER”. Put in the lab sample value. If you do not
have this take an estimated value. This can be changed afterwards*.
7. Go to ”Mod” and chose ”Trig” and press ”ENTER”.
The central unit will now show the Measuring values menu again. The green LED
lamp on the door shall now go back to steady light which indicates working
position.
*If you do not have the value for the lab test you can write an estimated value.
Later, when you have the real value from the lab you put that in instead, with no
need to do the calibration again. If you get the value of the lab sample after a
couple of days you must go to ”Calibrate” in the menu and change the estimated
value to the correct one. Exit all menus back to measuring value display again.
4. Detailed information of CBX
The sludge blanket monitor system is constructed from parts built inside a cabinet. The
parts are described and illustrated in the sections below.
Main control board
Huvudkortet styr och hanterar alla signaler som fläkt, värme och motorstyrning och
BB1/BB2 kommunikation. All data som hanteras från givaren till BB1/BB2 är digitala.
fig 5

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CBX
The main control board controls the mechanical events in the cabinet and communicates
with both sensor and BB1/BB2. The BB1/BB2 communication is done through RS-485
interface.
Other signals going in and out of the cabinet are also connected to the main control
board.
The board collects the values of sludge concentration from the sensor and distributes
them to the BB1/BB2 for presentation.
Sensor
The sensor is connected to a cable that supplies it with power and transmits the
communication signals. The sensor contains a near-infrared light source and a receiver
that are positioned in such a way that the light passes through the liquid.
fig 8
Cable drum assembly
The cable drum moves the sensor up and down in the clarifier. It is mounted directly on
the axle of a synchronous motor, hidden behind the drum mounting plate, with a very
constant speed. Since the diameter of the cable roll in the drum varies, the speed of the
sensor will vary. It will move slower during the end of the sampling cycle.
The cable and sensor are cleaned by a water spray in the flushing tube mounted below
the SS enclosure during return of the sensor to the home position.
fig 9

fghj
19
CBX
Heater & fan
Hidden behind the drum mounting plate there is a heater which is used in cooperation
with the fan to maintain a stable temperature inside the cabinet. The fan is mounted on
the top right side of the cabinet,fig10.
fig 10
Flushing tube & valve
The flushing tube contains a flushing nozzle ring that sprays cleaning water around the
sensor and cable during the return or rising of the sensor to the home position.
The flushing valve is controlled by the main control board.
In the top of the flushing tube is the home position sensor. There is an inductive limit
switch in the top of the flushing tube to determine the correct position or home position
of the sensor. There is a SS clip on the cable for the limit switch to detect when in the
home position, fig 11.
fig 11
Connection terminal
In the lower left corner of the cabinet there are connection terminals for the external
wire connections. To the lower left corner of this terminal block there is a safety switch
that will disconnect the power when the cabinet door is opened. There is also an
emergency motor control switch that is located on the box for the terminal block inside
the CBX. The switch can be located on top of the terminal box or under the lid, fig 12.
fig 12

fghj
20
CBX
5. Safety instructions, CE marking
The instrument is CE marked and follows EU directives and standards as listed below.
Installation of the equipment should be done by authorized personnel only.
CBX may not be installed so that the safety of the plant is affected or where there is a risk of
explosion.
Operation and service may only be carried out by trained personnel. The equipment should be
installed with a safety switch to facilitate installation and service.
The electrical equipment fulfills applicable regulations and the electronics are encapsulated
(IP 65, NEMA 4). Electrical connections must only be carried out by authorized personnel.
CBX conforms to the following EC Directive(s) when installed in accordance with the
installation instructions contained in the product documentation:
Machine Directive: 2006/42/EG
Low Voltage Directive: 2014/35/EU
EMC Directive: 2014/30/EU
The standards and/or technical specifications referenced below have been applied:
For Low Voltage Directive:
SS-EN-60950 1 Ed 2:2006 Information technology equipment. – Safety – Part 1: General
requirements.
SS-EN 61010-1 Ed 3:2010 Electrical equipment for measurement, control and laboratory
purposes – Safety – Part 1: General requirements.
For EMC-directive:
SS-EN 61000-6-2 Ed 3:2005 Electromagnetic compatibility part 6-2: Generic standards –
Immunity for equipment in industrial environments.
SS-EN 61000-6-4 Ed 2:2007 Electromagnetic compatibility part 6-4: Generic standards –
Emission standard for equipment in industrial environments.
5. Maintenance
The electronics have a built-in system for monitoring sensors, communication and mechanics.
Nevertheless, we recommend a regular inspection of mechanics and sensors as shown below,
as CBX is a mechanical product. How often a CBX requires a more comprehensive service is
primarily determined by how hard the machine is loaded and the environment in which it is
installed.
The wear is mainly dependent on is mainly dependent on how many meters of cable which is
wound by the CBX per time unit.
The wear rate thus depends on how often the sensor is transmitted down/up by the CBX and
the length of cable that is wound at each time.